Query : 2018A&A...612L...7F

2018A&A...612L...7F - Astronomy and Astrophysics, volume 612, L7-7 (2018/4-1)

On the formation of runaway stars BN and x in the Orion Nebula Cluster.


Abstract (from CDS):

We explore scenarios for the dynamical ejection of stars BN and x from source I in the Kleinmann-Low nebula of the Orion Nebula Cluster (ONC), which is important because it is the closest region of massive star formation. This ejection would cause source I to become a close binary or a merger product of two stars. We thus consider binary-binary encounters as the mechanism to produce this event. By running a large suite of N-body simulations, we find that it is nearly impossible to match the observations when using the commonly adopted masses for the participants, especially a source I mass of 7M. The only way to recreate the event is if source I is more massive, that is, ∼20M. However, even in this case, the likelihood of reproducing the observed system is low. We discuss the implications of these results for understanding this important star-forming region.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: numerical - stars: formation - stars: kinematics and dynamics

CDS comments: Source x is LBLS x in Simbad.

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2137 1
2 V* V2254 Ori Or* 05 35 14.11296 -05 22 22.7316           B 303 2
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2153 1
4 2MASS J05351519-0522367 Y*O 05 35 15.193 -05 22 36.79           ~ 24 0
5 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1541 1

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